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(72k, 482x747)<br><b>Country:</b> United States<br><b>City:</b> New York<br><b>System:</b> New York City Transit<br><b>Location:</b> IRT Substation 21<br><b>Photo by:</b> David M. Rosenthal<br><b>Date:</b> 10/22/1996<br><b>Notes:</b> Sychroscope for synchronizing rotary converter.  When a rotary converter is brought up to speed by the third rail, then the sychroscope and associated sychronizing lights are used to determine when rotary converter is in step or sychronized with the incoming AC power feeds.  At that time, the rotary converter is disconnected from the third rail and the AC power feeders at connected to run the rotary converter.<br><b>Viewed (this week/total):</b> 11 / 10218


(72k, 482x747)
Country: United States
City: New York
System: New York City Transit
Location: IRT Substation 21
Photo by: David M. Rosenthal
Date: 10/22/1996
Notes: Sychroscope for synchronizing rotary converter. When a rotary converter is brought up to speed by the third rail, then the sychroscope and associated sychronizing lights are used to determine when rotary converter is in step or sychronized with the incoming AC power feeds. At that time, the rotary converter is disconnected from the third rail and the AC power feeders at connected to run the rotary converter.
Viewed (this week/total): 11 / 10218



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Resolution : 482 x 747



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